Chronically yellow (but otherwise normal) nails may be related to underlying blood sugar issues that are often linked to conditions like diabetes, hypothyroidism, or even psoriasis. Excess sugar in the body can lead to a process called protein glycation, which can break down collagen (a protein crucial to our skin and nails) and cause nails to yellow.

However, if your yellow nails are also becoming thicker, you’re likely looking at an acute infection, like nail fungus. “Thickening of the nail plate, lifting of the nail plate from debris underneath, and yellowing are early signs of a fungal infection.

If your nail yellowing is caused by fungus, we will prescribe oral antifungal medication or medicated nail polish or cream to clear it up.

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